Friendly and cautionary note: Not everyone is going to be able to do all of these workouts, and some people won’t be able to do any of them. And what’s hard for one person might be easy for another — it all depends on your individual level of fitness. Before you begin any new exercise regimen, you should talk to your doctor about what’s safe and right for you. And if you feel faint or dizzy or pain during the course of any of these workouts, stop immediately and seek medical attention.

5- to 10-Minute Workouts

1. Tone All Over Workout (Women’s Health)

Length: 5 minutesEquipment needed: Two pairs of dumbbells — one heavy, one lighter (in case you need it)The gist: High-intensity circuit training (HICT) workout. You’ll do five exercises in five minutes. For each move, do as many reps as you can for 50 seconds, rest for 10 seconds, and move on to the next move. You can stop working out after one circuit if you need to, but for best results repeat the whole circuit three or four times in a row. FYI: Includes some lateral movement, lunges, hops

3. 5-Minute 5-Move Leg and Butt Routine (Women’s Health)

Length: 5 minutesEquipment needed: Two pairs of dumbbells, one heavier, one lighter if you need itThe gist: HICT workout — five moves in five minutes, 50 seconds per move, 10 seconds rest. Repeat the whole circuit a few times for best results.FYI: Includes some lateral movement, squats, lunges

5. Spinal Cord Injury Aerobic Workout: Paraplegia

Length: 7 minutes and 45 secondsEquipment needed: NoneThe gist: A series of upper-body exercises performed back to back.FYI: This workout was created by the National Center on Health, Physical Activity and Disability (NCPAD).

From the YouTube video page: NCPAD presents “Exercise Program for Individuals with Spinal Cord Injuries: Paraplegia”. This video is funded by the Christopher & Dana Reeve Paralysis Resource Center and developed in conjunction with the Rehabilitation Institute of Chicago and the National Center on Physical Activity and Disability.

6. 8-Minute Boot Camp Workout from XHIT Daily

Length: About 7 minutesEquipment needed: NoneThe gist: HICT workout. Six moves, 30 seconds each, and then repeat. For better results, repeat the whole thing at least one more time.FYI: Includes squats, kicks, running in place

8. Spinal Cord Injury Aerobic Workout: Tetraplegia

Length: 9 minutes 20 secondsEquipment needed: NoneThe gist: A series of upper-body movements performed back to back.FYI: This is another video from the NCPAD, made for people with spinal cord injuries resulting in tetraplegia.

10- to 20-Minute Workouts

Length: 10 minutesEquipment needed: NoneThe gist: High-intensity bodyweight workout. Five exercises total. For each exercise, you do four rounds of 20 seconds on, 10 seconds rest. Then you move on to the next move. FYI: Includes running in place, lunges, burpees, jumping

14. BabyFit’s Lower Body Workout for Pregnancy (SparkPeople)

Length: 14 minutesEquipment needed: None, although you might want a chair for balance (and you can add dumbbells if you are up for it, to make it harder)The gist: Short lower-body strength and stretching routine, designed by certified prenatal fitness specialistsFYI: Includes some squats. Before you do this workout (or any workout) during pregnancy, talk to your doctor about what’s safe for you.

15. Level 1 Beginners Workout (Chris Powell)

Length: 15 minutesEquipment needed: NoneThe gist: Total-body bodyweight moves performed one after another, no rest between moves. Good for fitness beginners.FYI: Includes jumping, lunges, some lateral movement

16. 15-Minute Insanity Cardio Workout Exercises (HASfit)

Length: 15 minutesEquipment needed: Light dumbbellsThe gist: High-intensity cardio moves performed back to back with no rest between moves. Best for people with intermediate to advanced fitness levels.FYI: Includes some lateral movement, jumps, high knees, mountain climbers

17. 15-Minute Total Body HIIT Workout (FitnessBlender)

Length: 15 minutes (not including your warmup)Equipment needed: NoneThe gist: High-intensity interval training (HIIT). This is very intense. You have four pairs of exercises. For each move, you do 20 seconds on, 10 seconds off, and alternate from one move to the next in each group. Do 3 sets per group, then move on to the next group. The last round of exercises will be a burnout round.FYI: Includes jumps, squats, clapping push-ups, jumping lunges, burpees

20. The Total Mobility Workout (Sonima)

Length: 18 minutesEquipment needed: A bench or sturdy chairThe gist: This workout was designed by Pete Egoscue, an alignment and movement expert, and it’s good for people who are trying to improve their mobility and posture. Good for beginners.FYI: Includes running in place, squats

22. Shaun T 20-Minute Workout

Length: Roughly 20 minutesEquipment needed: NoneThe gist: High-intensity circuit workout. Series of four-minute circuits. Each circuit has four moves; do each move for 15 seconds, no rest between moves, four rounds total. Very intense, but modifiable. There’s also a break in the middle.FYI: Includes running in place, jumps, burpees, lateral movement, squats, mountain climbers, high knees

Length: 20 minutesEquipment needed: NoneThe gist: Low-impact cardio workout for pregnant women.FYI: Includes some lateral movement, marching in place. Before you work out during your pregnancy, definitely talk to your doctor about what is safe for you.

25. Holly Perkins 360 Fit Tone (Exercise TV)

Length: About 20 minutesEquipment needed: One pair of dumbbellsThe gist: Total-body strengthening routine, good for people with beginner or intermediate fitness levels.FYI: Includes running in place, lunges, lateral movement, squats

26. Shaun T Shoulders, Biceps, and Triceps Workout

Length: Roughly 24 minutesEquipment needed: Two sets of dumbbells, one heavy, one lighter (find the weight that works for you — Shaun T says that it should be heavy enough that by rep 7, you’re “feeling it.”)The gist: Strength-training circuits focused on your upper bodyFYI: Includes push-ups, boxing, some lateral movement, lots of dumbbell moves

27. Jillian Michaels 30 Day Shred: Level 1

Length: 27 minutesEquipment needed: DumbbellsThe gist: This is a beginner workout with both strength-training moves and cardio. The video offers modifications to make moves harder and easier.FYI: Includes some jumps, push-ups, squats, lunges, and lateral movement

28. 30-Minute Total Body Strength and Conditioning Workout (Jen Widerstrom and David Jack for EVEN Hotels)